Band-marker for backs of books



no Model.)

H. TRUMBULL. BAND MARKER FOR BACKS 0P BGOKS.

No. 475,830. Patented May 31, 1892.

UNITED STATES.

I PATENT CFFIcE.

I'IUGII TRUMBULL, OF HARTFORD, CONNECTICUT.

BAND-MARKER FOR BACKS OF BOOKS.

I SPECIFICATION forming part of Letters Patent No. 475,830, dated May31, 1892.

Application filed March 3, 1892. Serial No. 423,584. (No model.)

To all whom it may concern:

Be it known that I, HUGH TRUMBULL, of .IItllfOltLlil the county ofHartford and State of Connecticut, have invented certain new and usefulImprovements in Band-Markers for Backs of Books, of which the followingis a full, clear, and exact description, wherebyany one skilled in theart can make and use the same.

The object of my invention is to provide a device to be used inconnection with the art of binding books for the purpose of determiningvery quickly and accurately the exact position of the strips that areused on the backs of the books. The back of a book usually embodies abacking-strip of stiff material, usually pasteboard, over which anothermaterial, as cloth or leather, is secured, as by means of glue or otheradhesive material.

My invention consists in a marking-table having a series of gage-lineson one or both faces of the board; and it consists in further details ofthe device, and in the combination of the several parts making up themarkingtable as a whole, as more particularly hereinafter described, andpointed outin the claims.

Referring to the drawings, Figure 1 is a detail plan view of one side ofthe markingtable. Fig. 2 is a detail plan view of the opposite side ofthe marking-table. Fig. 3 is a detail view in cross-section, on anenlarged scale, through the table or plate.

In the accompanying drawings, the letter a denotes the marking-table,that may be of any desired material, as wood or metal, although thelatter is preferred, and this table has preferably two parallel edges orand a and is tapered on the sides. The surface of the table hasa seriesof lines I), that are parallel to each other and to the edge a of thetable. The side edges of the table are flanged, so as to form shouldersc c, and the lines Z) extend across from side to side between theseshoulders.

On the surface shown in Fig. 1 a series of gage-lines d, arranged inpairs, are drawn, the proportional distance between each of the pairs orsets of gage-lines d on the edge a being the same as the proportionaldistance on the edge a These gage-lines are arranged with specialreference to the lengths of books or their backs that are to be markedon any given surface. For instance, close to the edge a the gage-linesare arranged at the proper distance apart with respect to the length ofthe book that may be marked on that edge, while on the opposite edge athe gage-lines are arranged at the proper distance apart to properlyindicate the position where bands would be placed on the back of abookof a length corresponding to that edge. The gage-lines are then drawnstraight between these extreme points. The result of this arrangement ofparallel lines in one direction and gage-lines in the other is that thespaces between any two of the parallel lines meas ured between the pairsof gage-lines is proportional on whatever one of the parallel lines thedistances'may be measured. The object of this arrangement of parallellines and tapering gage-lines is to enable the back piece of a book tobe correctly marked in proper proportion, so that whatever the size ofthe book the transverse strips may be placed in proper relativepositions and with the spaces between the strips exactly proportional inthe several sizes.

Another arrangement of lines is shown in Fig. 2, and this arrangementmay be used on the reverse side of the same table.

This marking-table is used as follows: A back piece 6, of pasteboard orother material that is to be used in making the back of a book, isplaced on the surface of a table and held with one edge on one of theparallel lines or close to it. By means of a T-square orother devicecrosswise lines 6' are drawn on the surface of the back piece 6 from thenearest intersections of the parallel lines and the gagelines, and theselines 6 denote the place on which the backing-bands are to be seen red.

I prefer to make the marking-rulerf a permanent attachment by securingit to a head g and mounting this head, that has a tubular socket, on therod h, the rule and the head forminga T-square, that is movable alongthe rod h. This T-square may be swung over from one side to the other ofthe board, so that it may be used whether in connection with the seriesof lines shown in Fig. 1 or the series that are drawn on the oppositeside and that are shown in Fig. 2 of the drawings.

The T-square is slipped upon the rod h,

that forms a pivot on which the T-square can be rotated. The bladeoverlies and extends along one surface of the table, as shown in Fig. 1of the drawings, and can be swung around on the rod in a plane at rightangles to the plane of theboard and caused to overlie the oppositesurface shown in Fig. 2,if desired-that is, by reason of this method ofattachment the T-square is so connected to the board as to be readilyslid along the rod h from side to side of the board, or rotated on therod as on a hinge, so as to enable the blade to projectacross andoverlie the opposite surface of the board that is shown in Fig. 2 of thedrawings. I

I claim as my invention- 1. A marking-table having on its surface aseries of parallel lines drawn in one direction, and aseries of taperedlines drawn transverse ]y of the first set and dividing the parallellines into proportional spaces, all substantially as described.

2. A marking-table having tapered edges, each provided with a raisedshoulder or flange, and a series of paralled lines drawn transversely ofthe table between the raised edges,

and a series of tapering lines drawn transversely of the table acrossthe parallel lines and dividing them into proportional spaces, allsubstantially as described.

3. A marking-table having shoulders along two edges, a series ofparallel lines extending between said edges, a series of tapered linesarranged in pairs and drawn transversely of the parallel lines anddividing them into proportional lengths, and a T-square movably attachedto the edge of the table, all substan-- HUGH TRUMBULL. Witnesses:

CHAS. L. BURDETT,

THAs. B. CHANDLER.

